cell biology.txt

membrane phospolipid arrage themeselves w/ the hydrophillic ends towards the -- of the membrane and the hydrophobic ends towards the --- of the membrane

A. internal face/external face
B. surface/center
C. external face/internal face
D. center/surface

A protein that adheres to the intracellular face of the plasma membrane is called an

A) peripheral protein.
B) integral protein.
C) transmembrane protein.
D) None of the above.

Membrane proteins that aid in
communications from other cells are

A. glycocalyx.
B. carriers
C. receptors.
D. clonal proteins
E. motor molecules.

----increase a cell's external surface area and are found on intestinal cells.

A. Flagellae
B. Microvilli
C. Ribosomes
D. Cilia
E. Glycocalyx

When blood pressure in capillaries forces water and dissolved solutes out into the tissue fluid, this is called
a. filitration
b. diffusion
c. osmosis
d. osmotic pressure

The hydrostatic pressure required to stop osmosis is known as
A. filitration pressure
B. transport pressure
C. osmotic pressure
D. diffusion pressure

Blood cells in a hypotonic solution will
A. burst (hemolysis).
B. shrink (crenation).
C. plasmolyze.
D. stay the same

The Na+ K+ pump is associated with
A. active transport
B. resting membrane potential
C. antiporters and symporters
D. all of the above

Where the extracellular fluid is more highly concentrated than the intracellular fluid, we may say it is
A. hypotonic
B. actively transported
C. isotonic
D. osmotic
E. hypertonic

By what method can the intestinal cells absorb sodium ions if they are in higher concentration inside the cell?
a. active transport
b. osmosis
c. diffusion
c. facilitated diffusion
d. filtration

Which of the following organelles can be compared to a power-house because it supplies the cell with energy?
A. mitochondria
B. golgi complex
C. nucleus
D. chloroplast

The nucleus of the cell
A. is the site of RNA synthesis.
B. is the largest organelle in eukaryotes.
C. has a double membrane.
D. all of the above

Endoplasmic reticulum can be smooth or rough. The rough endoplasmic reticulum is different from the smooth because it has _____ embedded in it.
A) ribosomes
B) lysosomes
C) peroxisomes
D) chromatin

Which structure increases cell surface area?
A) microtubules
B) microfilaments
C) microvilli
D) inclusions

The glycolipids and glycoproteins function to
A) increase cell surface area.
B) provide structural support to the cell.
C) confer each cell's unique identity or fingerprint.
D) increase membrane fluidity.

Which of the following structures is most closely related to moving particulate matter along the surface of epithelium?
A) flagella
B) cilia
C) microvilli
D) brush border

Which tonicity describes a solution that has a lower concentration of nonpermeating solutes than the intracellular fluid?



A)
hypertonic



B)
hypotonic



C)
isotonic



D)
heterotonic